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Title: Experimental investigation of alpha-gas states using high-multiplicity particle spectroscopy
Author: Bishop, Jack Edward
ISNI:       0000 0004 7426 1940
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 2018
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The onset of a new state of matter in the nucleus, whereby the system can be described as a dilute gas of α-particles, represents a fantastic probe of the nuclear force. The observables from such an α-gas state are discussed here in tandem with a discussion of traditional α-cluster structure. An experiment, utilising a high energy compound nucleus reaction to study the ¹²C(¹⁶O,7α) reaction was performed at LNS Catania to search for the signatures of such a state of matter. Direct evidence of near-threshold α-gas states was found to be impeded by the effect of the Coulomb barrier. The break-up of the system into α-particles was seen to exceed the predictions from a statistical decay model of the compound nucleus which was performed. These results were instead compared with the Fermi break-up model which showed a greater agreement with the data but the limitations of the model meant an exact agreement was not achieved. No evidence of α-condensation was found in this experiment however an improved experiment where the effect of the Coulomb barrier is no longer important is presented as a future probe of this structure.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: QC Physics